Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
the letters, and sometimes the numbers, that identify a radio or TV transmitting station
Used by arrangement with John Wiley & Sons, Inc.
plural nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The identifying code letters or numbers of a radio or television transmitting station, assigned by a regulatory body. Also called call sign.